23563864 has 8 divisors (see below), whose sum is σ = 44182260. Its totient is φ = 11781928.

The previous prime is 23563849. The next prime is 23563877. The reversal of 23563864 is 46836532.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×23563864² = 1110511373220992, which contains 22 as substring.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1472734 + ... + 1472749.

Almost surely, 2^23563864 is an apocalyptic number.

It is an amenable number.

23563864 is a deficient number, since it is larger than the sum of its proper divisors (20618396).

23563864 is a wasteful number, since it uses less digits than its factorization.

23563864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2945489 (or 2945485 counting only the distinct ones).

The product of its digits is 103680, while the sum is 37.

The square root of 23563864 is about 4854.2624568517. The cubic root of 23563864 is about 286.6919525800.

The spelling of 23563864 in words is "twenty-three million, five hundred sixty-three thousand, eight hundred sixty-four".